Laptop screens have so far topped out at 3200 x 1800 pixels in Samsung's Ativ Book 9 Plus, Lenovo's Yoga 2 Pro and Razer's Blade gaming laptop. TVs, monitors and cameras with support for 4K are already available.

Lenovo in January announced two 4K laptops -- the Y50 and the 14-inch Y40 -- but the initial units that shipped in May were missing 4K screens and instead came with HD screens. The Y40 model is not yet available with a 4K screen. Lenovo was having issues acquiring 4K displays, which delayed some laptops and monitors.

The Y50 has some of the latest PC technologies, pushing it into the class of a true gaming laptop. The $1,299.99 model has a Core i7 i7-4710HQ processor, an Nvidia GeForce GTX 860M graphics chip with 2GB of video memory, 8GB of DRAM and 1TB of hard-drive storage. The $1,599.99 model has the same Core i7 CPU, the GeForce GTX 860M with 4GB of video memory, 16GB of DRAM and 512GB solid-state drive storage.